feat(nextcloud_test_presets): Add and verify app release checksums

[provokateurin]

Ensures we always download a valid file and that the release can not be replaced without noticing it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.66%. Comparing base (d34f98e) to head (76fff24).
Report is 18 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2537   +/-   ##
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  Coverage   28.66%   28.66%           
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  Files         366      366           
  Lines      136296   136296           
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  Hits        39076    39076           
  Misses      97220    97220           

Flag	Coverage Δ		*Carryforward flag
account_repository	98.76% <ø> (ø)
cookie_store	99.48% <ø> (ø)		Carriedforward from 8ee337b
dashboard_app	96.05% <ø> (ø)
dynamite	31.05% <ø> (ø)		Carriedforward from 8ee337b
dynamite_end_to_end_test	61.69% <ø> (ø)		Carriedforward from 8ee337b
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 8ee337b
interceptor_http_client	97.18% <ø> (ø)		Carriedforward from 8ee337b
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 8ee337b
neon_framework	59.20% <ø> (ø)
neon_http_client	97.50% <ø> (ø)
neon_notifications	100.00% <ø> (ø)		Carriedforward from 8ee337b
neon_storage	94.66% <ø> (ø)
neon_talk	99.45% <ø> (ø)		Carriedforward from 8ee337b
nextcloud	24.26% <ø> (ø)
notifications_app	97.40% <ø> (ø)
notifications_push_repository	98.59% <ø> (ø)
sort_box	90.90% <ø> (ø)		Carriedforward from 8ee337b
talk_app	98.94% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

[Leptopoda]

Do we really need to store the file?
I'm not a fan of many files cluttering my tmp folder if not needed.

1. The sha checksum should directly convert the byte stream
2. If we need the caching to avoid multiple downloads just store the hash in a map.

[provokateurin]

If we need the caching to avoid multiple downloads just store the hash in a map.

Good idea, somehow I didn't think about that solution 🤦‍♀️